Fix environment variables when launching via alias (PlayCover#1090)

* fix: metalhud not working when launch from alias

* fix: environment variables

---------

Co-authored-by: José Moreno <47700212+JoseMoreville@users.noreply.github.com>

PlayCover/Model/AppInfo.swift

@@ -235,6 +235,31 @@ public class AppInfo {
         return "AppIcon"
     }
 
+    var lsEnvironment: [String: String] {
+        get {
+            if self[dictionary: "LSEnvironment"] == nil {
+                self[dictionary: "LSEnvironment"] = NSMutableDictionary(dictionary: [String: String]())
+            }
+
+            return self[dictionary: "LSEnvironment"] as? [String: String] ?? [:]
+        }
+        set {
+            if self[dictionary: "LSEnvironment"] == nil {
+                self[dictionary: "LSEnvironment"] = NSMutableDictionary(dictionary: [String: String]())
+            }
+
+            if let key = newValue.first?.key, let value = newValue.first?.value {
+                self[dictionary: "LSEnvironment"]?[key] = value
+
+                do {
+                    try write()
+                } catch {
+                    Log.shared.error(error)
+                }
+            }
+        }
+    }
+
     func assert(minimumVersion: Double) {
         if let double = Double(minimumOSVersion) {
             if double > 11.0 {

PlayCover/Model/PlayApp.swift

@@ -202,6 +202,33 @@ class PlayApp: BaseApp {
         }
     }
 
+    func introspection(set: Bool? = nil) -> Bool {
+        if info.lsEnvironment["DYLD_LIBRARY_PATH"] == nil {
+            info.lsEnvironment["DYLD_LIBRARY_PATH"] = ""
+        }
+
+        if let set = set {
+            if set {
+                info.lsEnvironment["DYLD_LIBRARY_PATH"]? += "/usr/lib/system/introspection:"
+            } else {
+                info.lsEnvironment["DYLD_LIBRARY_PATH"] = info.lsEnvironment["DYLD_LIBRARY_PATH"]?
+                    .replacingOccurrences(of: "/usr/lib/system/introspection:", with: "")
+            }
+
+            do {
+                try Shell.signApp(executable)
+            } catch {
+                Log.shared.error(error)
+            }
+        }
+
+        guard let introspection = info.lsEnvironment["DYLD_LIBRARY_PATH"] else {
+            return false
+        }
+
+        return introspection.contains("/usr/lib/system/introspection")
+    }
+
     func hasAlias() -> Bool {
         return FileManager.default.fileExists(atPath: aliasURL.path)
     }

PlayCover/Views/AppSettingsView.swift

@@ -81,7 +81,9 @@ struct AppSettingsView: View {
                     }
                     .disabled(!(hasPlayTools ?? true))
                 BypassesView(settings: $viewModel.settings,
-                             hasPlayTools: $hasPlayTools)
+                             hasPlayTools: $hasPlayTools,
+                             hasIntrospection: viewModel.app.introspection(),
+                             app: viewModel.app)
                     .tabItem {
                         Text("settings.tab.bypasses")
                     }
@@ -442,6 +444,10 @@ struct BypassesView: View {
     @Binding var settings: AppSettings
     @Binding var hasPlayTools: Bool?
 
+    @State var hasIntrospection: Bool
+
+    var app: PlayApp
+
     var body: some View {
         ScrollView {
             VStack {
@@ -462,13 +468,16 @@ struct BypassesView: View {
                 }
                 Spacer()
                 HStack {
-                    Toggle("settings.toggle.introspection", isOn: $settings.settings.injectIntrospection)
+                    Toggle("settings.toggle.introspection", isOn: $hasIntrospection)
                         .help("settings.toggle.introspection.help")
                     Spacer()
                 }
             }
             .padding()
         }
+        .onChange(of: hasIntrospection) {_ in
+            _ = app.introspection(set: hasIntrospection)
+        }
     }
 }